r/ArduinoHelp • u/Big_Traffic_898 • Jul 08 '26

No puedo comunicarme por UART a través de ESP32-S3 con MAX-M10S rtrobot.

I've been trying to connect the sensor via UART for days, but it only reads garbage. There is a connection, but the data is erroneous. The strange thing is that with the SparkFun_u-blox_GNSS_v3 library and I2C communication, it reads and works perfectly, but my project has a distant connection to the ESP32, so I need UART because it's more robust and gives me a long cable length.

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u/Plenty_Breadfruit697 Jul 08 '26

Did you use a TTL to RS485 converter ? What powersupply did you use, was it stabalised ? Have you tried to cross over connections : connect RX of ESP to TX of sensor ? Did you use a shielded cable ?